201202588201202588
六、發明說明： 【發明所屬之技術領域】 .本發明是關於一種自管路的内面侧對管路的管體接 頭部進行修補的管内面修補接頭。 【先前技術】 一般而言，用於農業用水、工業用水、自來水等的管 路包括由聚碳酸酯（polycarbonate，PC)管或鋼管製成的 管體。該管體配置於在地面上挖掘的槽内，管體彼此由管 體接頭部連結。然後，藉由用土填埋該槽而將管路（管體） 埋設於地下。 埋設於地下的管路由於長期使用，有時會於管體接頭 部發生洩漏。當於管路的管體接頭部發生洩漏時為了止 住管路的管體接頭部_漏，必須對管路的管體接頭 4千修站。 為了進行此種修補而開發有下述的管内面修補 的内：橡^ (η^Γ Η"18)配置於管體接頭部的洩漏部 、 並且於該橡膠環的内面配置擴展帶，由&，Hr 定於管體的内面(曰本專利特帶開平由= 夂進入管體内部的程度的大直徑的情形。 沒漏部的内面，將橡膠環配置於管體接頭部的 橡膠環壓緊固定==於:橡膠環的内面，並使該 漏進行修補。 ㈣面，由此㈣管體接頭部的戌 4 201202588 s如圖5及圖6所示，此種管内面修補接頭包括：橡膠 父與應連接的管體1、1的端部la、la的内面橋接 的方式配置著；以及擴展帶（band) 3、3，配置於橡膠環 部的各自内面。各擴展帶3包括：複數個圓弧狀 =段（segment) 3a ;以及卡止爪部5，形成於各圓弧狀 以3a的端部4 ’可卡止於所對應的其他圓弧狀區段^ 的端部4。又，於相互鄰接的圓弧狀區段3a、3a的端部4、 4之間亦插裝有間隔件（spacer ) 6。 〇又，如圖7所示，於各圓弧狀區段3a的端部形成有 操作紅筒（cylinder) 7的缸筒7a及活塞（pis㈣几可卡 ^的卡止開口 8。當將操作缸筒7的缸筒7a及活塞几卡 &於相互鄰接的圓弧狀區段3a、3a中所設置的卡止開口 =時，错由使操作缸筒7作動，可將相互鄰接的圓弧狀 品又3a、3a向相互離開的方向推壓。然後，藉由將間隔件 插裝於相互鄰接的圓弧狀區段3a、％的端部*、4之間， 可將圓弧狀區段3a、3_持於相互離開的狀態，即，可維 持圓弧狀區段3a、3a緊固於橡膠環2的狀態。 【發明内容】 〜 *然而’於上述管_修補接頭中，f _内面狀態由 於長期使用而呈現各種各樣的狀態，另一方面，難以變更 ，隔件6的尺寸（size) ’因此，難以使各圓弧狀區段如 相對於橡膠環2的緊固固定的程度成為固定，其結果，有 時無法充分獲得防止浪漏的效果。 又’於上述管内面修補接頭中，管路的内面狀態由於 201202588 ，期使用而呈現各種各樣的狀態，另一方面將必須具有規 定強度的橡膠環2直接配置於管路的内面，因此，橡膠環 2的=軟財充分’其結果，㈣無法充分獲得對管路二 =的密封（seal)性能，從而無法充分獲得防止茂漏的效 本發明是著眼於以上問題並為了有效地解決 ::::管於提供-種可顯著改善‘ =;面到達另_側管體的内面的方式配】著 間；-側擴展帶，配置於主橡二:的一=與主橡膠環之 以使主橡膠環壓接於體的内面，用 環壓接於另-側管體的=心體的内面’用以使主橡膠 根據本發明，於管體 助橡膠環，藉此，例如心 _主橡杨之間插裝有輔 藉由使賊性_材^ *乏怖生時， 環以包住粗糙的凹凸面的：：助橡膠環，來使該辅助橡膠 的密封性能，另—方面二進仃密接，從而可獲得可靠 強度的橡膠材料。 ；主橡膠環，可使用具有規定 本發明令，較佳為主橡膠環與輔助橡膠環由不同的橡 201202588 膠構成。 尤其自本案發明者等的各種實驗結果得知如下的知 識見解·主橡膠壞的曰本工業標準（japanese In(justriaiVI. Description of the Invention: [Technical Field to Which the Invention Is Applicable] The present invention relates to a pipe inner face repair joint for repairing a pipe body joint head of a pipe from an inner surface side of a pipe. [Prior Art] In general, pipes for agricultural water, industrial water, tap water, and the like include pipes made of polycarbonate (PC) pipes or steel pipes. The pipe body is disposed in a groove excavated on the ground, and the pipe bodies are connected to each other by a pipe joint portion. Then, the pipe (pipe body) is buried in the ground by filling the tank with soil. Pipes buried in the ground sometimes leak at the pipe joints due to long-term use. In order to stop the pipe joint part_drain of the pipe when the pipe joint portion of the pipe leaks, the pipe joint of the pipe must be repaired by 4 thousand. In order to perform such repair, the following inner surface repair is developed: the rubber (η^Γ Η" 18) is disposed in the leak portion of the pipe joint portion, and an expansion band is disposed on the inner surface of the rubber ring, and &; Hr is fixed to the inner surface of the pipe body (the large diameter of the patented special zone is opened to the inside of the pipe body by = 夂. The inner surface of the non-leakage portion, the rubber ring is placed on the rubber ring of the pipe joint portion Tightly fixed == to: the inner surface of the rubber ring, and repair the leak. (4) Face, thus (4) 戌4 of the pipe joint joint part 201202588 s As shown in Fig. 5 and Fig. 6, the inner surface joint repair joint includes: The rubber parent is disposed in such a manner as to bridge the inner faces of the ends la, la of the pipes 1, 1 to be connected; and the bands 3, 3 are disposed on the respective inner faces of the rubber ring portions. Each of the expansion bands 3 includes: A plurality of arcs=segment 3a; and a locking claw portion 5 formed at an end portion 4' of each arcuate shape 3a can be locked to the end portion 4 of the corresponding other arcuate section ^ Further, spacers are also interposed between the ends 4, 4 of the arc-shaped sections 3a, 3a adjacent to each other. Further, as shown in Fig. 7, at the end of each of the arc-shaped segments 3a, a cylinder 7a for operating a cylinder 7 and a locking opening 8 of a piston (pi) (a plurality of snaps) are formed. When the cylinder tube 7a of the cylinder tube 7 and the piston card are in the locking opening provided in the arc-shaped sections 3a and 3a adjacent to each other, the operation cylinder cylinder 7 is actuated to be adjacent to each other. The arc-shaped products 3a and 3a are urged in a direction away from each other. Then, by inserting the spacers between the mutually adjacent arc-shaped sections 3a and %, the ends *, 4 can be arc-shaped. The segments 3a and 3_ are held apart from each other, that is, the state in which the arc-shaped segments 3a and 3a are fastened to the rubber ring 2 can be maintained. [Explanation] ~ * However, in the above-mentioned tube_repair joint, The f _ inner surface state exhibits various states due to long-term use, and on the other hand, it is difficult to change the size of the spacer 6 ' Therefore, it is difficult to fasten each arc-shaped section such as the rubber ring 2 The degree of fixation is fixed, and as a result, the effect of preventing leakage may not be sufficiently obtained. In the meantime, the inner surface of the pipe is in various states due to the use of 201202588. On the other hand, the rubber ring 2 having a predetermined strength must be disposed directly on the inner surface of the pipe. Therefore, the rubber ring 2 is fully soft. 'As a result, (4) The sealing performance of the pipe 2 = cannot be sufficiently obtained, so that the effect of preventing leakage is not sufficiently obtained. The present invention is directed to the above problems and is effectively solved in order to provide: It can significantly improve the '=; face to the inner surface of the other _ side pipe body with the 】 side; - side expansion band, placed in the main rubber two: one = with the main rubber ring to make the main rubber ring crimped to the body The inner surface of the core body is crimped to the other side tube body by a ring for the main rubber to be inserted into the tube body according to the present invention, whereby, for example, the heart-main oak is inserted When the thief is sturdy, the ring is wrapped with a rough surface: the rubber ring is used to make the sealing performance of the auxiliary rubber, and the other side is closely connected to obtain A reliable strength rubber material. The main rubber ring can be used with the provisions of the invention. Preferably, the main rubber ring and the auxiliary rubber ring are composed of different rubber 201202588 glue. In particular, from the various experimental results of the inventors of the present invention, the following knowledge is known: The main rubber is the standard of the industrial standard (japanese In (justriai
Standard ’ JIS)硬度較佳為60〜70，輔助橡膠環的JIS硬 度較佳為10〜30。 關於具體的橡膠材料而有如下的知識見解：主橡膠環 較佳為由天然橡膠、本乙稀-丁二稀橡膠（Styrene_buta(jiene rubber，SBR)、氣丁二烯（chl〇r〇prene)、乙烯_丙烯二烯 烴二兀共聚物（Ethylene-Propyiene_Diene Monomer， EPDM)中的任一種構成，辅助橡膠環較佳為由矽橡膠 (silicon rubber)構成。 〆 又，較佳為於主橡料的外表面，對應於—側辅助 膠環的插裝位置而設置有-側狹窄部，且對應於另一 助橡膠環的歸位置岐置有另_側狹窄部。#採用此= 構成時，在管肋流動的流體以將各辅 能 窄部的方式而發揮作用’因此’各 各狹 稀助橡膠環的密封性 又，較佳為各擴展帶包括複數個圓弧 個圓弧狀區段是經由安裝螺絲用長孔 = 5〆複數 U字孔的壓板而在圓周方向上自^ =開的帶有 用安裝螺絲用長孔的-端已打卽地連接者。藉由利 不 因 業 拔出安裝螺絲便可進行^的壓板， 此作業性進一步提高。i的位置調即及裝卸作 擴 展帶的帶有 又，較佳為於主橡膠環的内面，在與各 7 201202588 ^字孔的壓板對躺位置上插裝料義（—less㈤ SUS)板。藉此’可保護主橡膠環免受安裝螺絲的 傷害。 又較佳為於主橡膠環㈣面，並行地設置有：用以 侧擴展帶的-側凹部；用以收納另—側擴展帶的另 一側凹^ ;以及設置於-侧凹部與另—侧凹部之間的、辅 擴展I (ring)用的辅助凹部。是否在輔助凹部内配置 助擴展％是隨意的，但在細凹部㈣置有辅助擴展環 寻，可防止主橡膠環向内側變形。 為讓本發明之上料徵和優·更鶴綠，下文特 施例，並配合所附圖式作詳細說明如下》 【實施方式】 以下，基於實施形態來詳細地說明本發明。 、iM如圖1至圖3所示，本發明的一實施形態的管内面修 2頭10是使一側管體Ua與另-側管體lib液密地連接 另二内，修補接頭’其包括以自一側管體lla的内面到達 ja侧管體llb的内面的方式配置的主橡膠環12。主橡膠 ,12的兩端部構成為傾斜面部12t，以使管内流體順暢 Csmooth)地流動。 又’於一側管體lla的内面與主橡膠環12之間插裝 =輔助橡膠環13a，且在另一側管體nb的内面與主 膠％ 12之間插裝有插裝的另一側輔助橡膠環13b。 本實施形態的主橡膠環12的jIS硬度為65，但較佳 的JIS硬度的範圍為60〜70。另一方面，本實施形態的輔 201202588 OJZOipu 助橡膠環13a、13b的JIS硬度為2〇，但較佳的瓜硬度的 範圍為10〜3G。_具體的橡膠材料而言，主橡膠環i2 較佳為由天然橡膠、SBR、氯了二烯、EpDM中的任一種 構成’辅助橡膠環13a、13b較佳為由碎橡膠構成。 即’主橡膠環12可使用具有規定強度（硬度）的橡 膠材料m可使用軟性橡膠材料作為辅助橡膠環 13a、13b ’因此，當管體ua、llb的内面粗糙而缺乏平滑 性時，可使輔助橡膠環l3a、13b以包住粗糙的凹凸面的方 式進行密接而獲得可靠的密封性能。 又，如圖2及圖3所示，於主橡膠環12的外表面， 對應於一側輔助橡膠環13a的插裝位置而設置有一側狹窄 部22a，且對應於另一側輔助橡膠環13b的插裝位置而設 置有另一側狹窄部22b。如圖3所示’於一側輔助橡膠環 13a上設置有用以接受一側狹窄部22a的凹部23a，且於另 一側輔助橡膠環13b上設置有用以接受一側狹窄部22b的 凹部23b。藉由此種構成，在管體内流動的流體以將各輔 助橡膠環13a、13b擠向各狹窄部22a、22b的方式而發揮 作用。因此’各輔助橡膠環13a、13b的密封性能進一步提 高。 又，如圖2及圖3所示，於主橡膠環12的外表面的 一侧狹窄部22a的左右，與該一側狹窄部22a並行地設置 有輔助狹窄部24a、26a ’且在另一側狹窄部22b的左右， 與該另一側狹窄部22b並行地設置有辅助狹窄部24b、26b。 又，如圖1所示’於主橡膠環12的一侧管體11a的 201202588The standard 'JIS) hardness is preferably from 60 to 70, and the auxiliary rubber ring preferably has a JIS hardness of from 10 to 30. Regarding the specific rubber material, there is the following knowledge: the main rubber ring is preferably made of natural rubber, styrene-buta (jine rubber, SBR), butadiene (chl〇r〇prene). Any one of Ethylene-Propyiene_Diene Monomer (EPDM), the auxiliary rubber ring is preferably made of silicon rubber. Further, preferably for the main rubber material. The outer surface is provided with a side narrowing portion corresponding to the insertion position of the side auxiliary rubber ring, and the other side rubber narrowing portion is disposed corresponding to the other rubber ring. # Use this = when configuring, in the tube The flow of the rib fluid acts to narrow the auxiliary energy. Therefore, the sealing property of each of the narrow rubber rings is preferably, and each of the expansion bands includes a plurality of arcuate arc segments. Screw with long hole = 5 〆 plural U-shaped platen and in the circumferential direction from ^ = open with a long hole with mounting screws - the end has been slammed. By pulling out the installation screws Can be used for the pressure plate, this work into One step is improved. The position adjustment of the i is the same as that of the extension belt, preferably on the inner surface of the main rubber ring, and is inserted in the position of the plate with the 7 201202588 hole. (-less (five) SUS The plate can be used to protect the main rubber ring from the mounting screws. It is preferably placed on the main rubber ring (four) face, in parallel with: a side recess for the side expansion band; for housing the other side The other side recess of the extension belt; and the auxiliary recess for the auxiliary expansion I (ring) disposed between the -side recess and the other side recess. Whether or not the assist expansion % is disposed in the auxiliary recess is arbitrary, but The fine recess (4) is provided with an auxiliary expansion ring to prevent the main rubber ring from being deformed inward. In order to make the above-mentioned material of the present invention and the better and more crane green, the following specific examples are described in detail with the following figures: [Embodiment] Hereinafter, the present invention will be described in detail based on an embodiment. iM shown in Figs. 1 to 3, a tube inner surface repairing head 10 according to an embodiment of the present invention is a one-side tube body Ua and another- The side tube body lib is liquid-tightly connected to the other two, and the joint is 'included' The main rubber ring 12. The configuration of the main rubber manner the inner surface side of the tubular body reaches ja lla llb-side inner surface of the tubular body, the both ends of the inclined surface 12 is configured to 12T, so that the fluid inside smoothly Csmooth) flows. Further, the auxiliary rubber ring 13a is inserted between the inner surface of the one side pipe body 11a and the main rubber ring 12, and the other is inserted between the inner surface of the other side pipe body nb and the main rubber core 12 Side auxiliary rubber ring 13b. The main rubber ring 12 of the present embodiment has a jIS hardness of 65, but a preferable JIS hardness ranges from 60 to 70. On the other hand, the JIS hardness of the auxiliary 201202588 OJZOipu rubber ring 13a, 13b of the present embodiment is 2 〇, but the preferred guar hardness ranges from 10 to 3G. In the case of a specific rubber material, the main rubber ring i2 is preferably made of any one of natural rubber, SBR, chloradiene, and EpDM. The auxiliary rubber rings 13a and 13b are preferably made of crushed rubber. That is, the main rubber ring 12 can use a rubber material m having a predetermined strength (hardness), and a soft rubber material can be used as the auxiliary rubber ring 13a, 13b. Therefore, when the inner faces of the pipe bodies ua, 11b are rough and lack smoothness, The auxiliary rubber rings l3a, 13b are adhered in such a manner as to wrap the rough uneven surface to obtain a reliable sealing performance. Further, as shown in FIGS. 2 and 3, on the outer surface of the main rubber ring 12, a side narrow portion 22a is provided corresponding to the insertion position of the one side auxiliary rubber ring 13a, and corresponds to the other side auxiliary rubber ring 13b. The other insertion portion is provided with the other side narrow portion 22b. As shown in Fig. 3, a concave portion 23a for receiving the one side narrow portion 22a is provided on the one side auxiliary rubber ring 13a, and a concave portion 23b for receiving the one side narrow portion 22b is provided on the other side auxiliary rubber ring 13b. With such a configuration, the fluid flowing in the tubular body functions to urge the auxiliary rubber rings 13a and 13b toward the narrow portions 22a and 22b. Therefore, the sealing performance of each of the auxiliary rubber rings 13a, 13b is further improved. Further, as shown in FIGS. 2 and 3, on the left and right sides of the narrow portion 22a on the outer surface of the main rubber ring 12, the auxiliary narrow portions 24a, 26a' are provided in parallel with the one side narrow portion 22a. The left and right sides of the side narrowed portion 22b are provided with auxiliary narrowing portions 24b and 26b in parallel with the other side narrowed portion 22b. Further, as shown in Fig. 1, the one side of the main rubber ring 12 is in the body 11a 201202588
内面設置有一伽撼M 主橡膠環uait =該—側擴展帶⑷是為了使 複膜择17 μ接於一側管體11&的内面而配置著，且於主 14b，該另一llb的内面設置有另一側擴展帶 -側管體m 帶是為了使主橡膠環12M接於另 梭勝環U 而配置著。又，本實施形態中，於主 、中央部的内面設置有辅助擴展帶14c。 如圖4 fifr * . Ή 不，各擴展帶14a、Mb、14c包括4個圓孤 二區段31纽由安裝螺絲用長孔 上自如調節壓板30而在圓周方向 ^ 連接 藉由利用安裝螺絲用長孔的一端已 J歼ρ帶有U字孔的魏3〇，不拔出安裝螺絲40便可進 行該堅板30的位置調節及裝卸作業。因此，作業性步 提高。 〃 又’於主橡膠環12的内面，在與各擴展帶14a、14b、 的帶有U子孔的壓板％對應的位置上插裂板 ，藉此’可贿绿義12免受絲_^备害。 又於主橡膠環12的内面，並行地設置有：用以收 納-側擴展帶14a的-側凹部28a;用以收納另一側擴展 帶14b的另一侧凹部28b;以及設置在一側凹部2如與另 一側凹部28b之間的用以收納辅助擴展環14e的辅助四部 28c。是否在輔助凹部28c内配置辅助擴展環i4c是隨意 的，但當在輔助凹部28c内配置有辅助擴展環14e時，可 防止主橡膠環12向内側變形。 其-人’對本實施形態的管内面修補接頭1〇的安裝順 201202588 序進行說明。 當在埋設於地下的管路的管體接頭部發生液體 時，作業人員進入管路内以止住該接頭部的液顧漏匕: 後’如圖1所示，將本實施形態的管内面修補接頭1〇的^ 膠環12以使管體lla、llb與包含茂漏的接頭部的管體 11a、lib的端部内面橋接的方式而配置著。 繼而’將2條（或3條）擴展帶14a、14b (、14e) 配置於橡膠環12的内面上所設置的一側凹部2如及另一側 凹部28b (及輔助凹部28c)。如上所述，各擴展帶ΐ4&、 14b (、14c)是藉由經由帶有u字孔的壓板3〇來連結4 個圓弧狀區段31而形成。具體而言，4個圓弧狀區段31 經由帶有U字孔的壓板30與安裝螺絲40而暫時固定之 後，使用圖7所示的操作缸筒7而將1組鄰接的圓弧狀區 段31向在圓周方向上離開的方向推壓。而且，為了維持此 種推壓狀態，在該1組圓弧狀區段31之間插入有間隔件 35。此後，卸除該操作缸筒7。間隔件35的插入步驟結束 之後，藉由上述安裝螺絲40而將圓弧狀區段31固定於壓 板30以使該間隔件35不脫落。如此，設置於橡膠環12 的内面的擴展帶14a、14b (、14c)將橡膠環12推壓至管 體11a、lib的端部内面。藉此，包含管體lla、llb的接 頭部的部分藉由橡膠環丨2而密封。再者，根據各擴展帶 14a、14b (、14c)向管體内面的推壓狀態，亦可於其他鄰 接的圓弧狀區段31之間插入追加的間隔件35。 雖然本發明已以實施例揭露如上’然其並非用以限定 201202588 本發月任何所屬技術區域中具有通常知識者，在不脫離 本發明之精神和範圍内，當可作些許之更動與潤飾，故本 發明之保護範ϋ當視後附之申請專聰_界定者為準。 【圖式簡單說明】 圖1是表示本發明的一實施形態的内面修補接頭的内 面側的一部分的圖。 圖2是圖1所示的内面修補接頭的部分放大剖面圖。 圖3是安裝擴展帶之前的與圖2對應的圖。 圖4是表示本發明的一實施形態的内面修補接頭 展帶的連結部的圖》 、 圖5是表示安裝有先前的内面修補接頭的狀態的圖。 圖6是表示先前的内面修補接頭的擴展帶的連結部的 圖 圖7是表示用以使先前的内面修補接頭的擴展帶擴展 的操作缸筒的圖。 【主要元件符號說明】 1、 11a、lib :管體 h:管體1的端部 2、 12 :橡膠環 3、 14a、14b :擴展帶 3a、31 :圓弧狀區段 4 ·圓弧狀區段3a的端部 5:卡止爪部 6、35 :間隔件 12 201202588 羹 |>r “ 7 :操作缸筒 7a :缸筒 7b ··活塞 8:卡止開口 10 :管内面修補接頭 12t :傾斜面部 13a、13b :輔助橡膠環 14c :輔助擴展帶（輔助擴展環） 22a、22b :狹窄部 23a、23b、28a、28b :凹部 24a、24b、26a、26b :輔助狹窄部 28c :輔助凹部 30 :壓板 30h : U字孔 40 :安裝螺絲 50 : SUS 板 13The inner surface is provided with a gamma M main rubber ring uait = the side extension band (4) is arranged to connect the composite film to the inner surface of the one side tube body 11 & and is disposed on the inner surface of the main 14b, the other llb The other side extension belt-side tube body m belt is provided for the main rubber ring 12M to be connected to the other shuttle ring U. Further, in the present embodiment, the auxiliary extension belt 14c is provided on the inner surfaces of the main portion and the central portion. As shown in Fig. 4 fifr * . Ή No, each of the expansion belts 14a, Mb, 14c includes four circular two-sections 31 Newtons which are freely adjustable in the circumferential direction by the long holes in the mounting screws and are connected in the circumferential direction by using the mounting screws. One end of the long hole has J歼ρ Wei 3〇 with a U-shaped hole, and the position adjustment and loading and unloading operation of the plate 30 can be performed without pulling out the mounting screw 40. Therefore, the workability step is improved. 〃In the inner surface of the main rubber ring 12, the split plate is inserted at a position corresponding to the pressure plate % with the U sub-holes of each of the expansion belts 14a and 14b, thereby allowing the bribe to be protected from the wire _^ Prepare for damage. Further, on the inner surface of the main rubber ring 12, side-side recesses 28a for accommodating the side expansion belts 14a, the other side recesses 28b for accommodating the other side expansion belts 14b, and recesses provided on one side are provided in parallel. 2, such as the auxiliary four portion 28c for accommodating the auxiliary expansion ring 14e with the other side recess portion 28b. Whether or not the auxiliary expansion ring i4c is disposed in the auxiliary concave portion 28c is arbitrary. However, when the auxiliary expansion ring 14e is disposed in the auxiliary concave portion 28c, the main rubber ring 12 can be prevented from being deformed inward. The installation of the inner surface repair joint 1 of the present embodiment will be described in the order of 201202588. When liquid is generated in the pipe joint portion of the pipe buried in the ground, the operator enters the pipe to stop the leakage of the joint portion: After 'as shown in Fig. 1, the inner surface of the pipe of the present embodiment is used The rubber ring 12 of the repair joint 1 is disposed such that the tubular bodies 11a and 11b are bridged to the inner surface of the end portions of the tubular bodies 11a and 11b including the leaky joint portion. Then, two (or three) expansion bands 14a, 14b (, 14e) are disposed on one side of the concave portion 2 provided on the inner surface of the rubber ring 12, and the other side concave portion 28b (and the auxiliary concave portion 28c). As described above, each of the extension belts &4&, 14b (, 14c) is formed by joining four arc-shaped segments 31 via a pressure plate 3〇 having a u-shaped hole. Specifically, after the four arc-shaped segments 31 are temporarily fixed via the platen 30 with the U-shaped holes and the mounting screws 40, a set of adjacent arc-shaped regions is used using the operating cylinder 7 shown in FIG. The segment 31 is urged in a direction away from the circumferential direction. Further, in order to maintain such a pressing state, a spacer 35 is inserted between the one set of the arcuate sections 31. Thereafter, the operating cylinder 7 is removed. After the insertion step of the spacer 35 is completed, the arc-shaped section 31 is fixed to the pressure plate 30 by the above-described mounting screw 40 so that the spacer 35 does not fall off. Thus, the expansion bands 14a, 14b (, 14c) provided on the inner surface of the rubber ring 12 press the rubber ring 12 to the inner surface of the end portions of the tubular bodies 11a and 11b. Thereby, the portion including the joint of the tubular bodies 11a, 11b is sealed by the rubber ring 2 . Further, depending on the state in which the expansion bands 14a, 14b (, 14c) are pressed toward the inner surface of the tube, an additional spacer 35 may be inserted between the other adjacent arc-shaped segments 31. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the general knowledge of any of the technical regions of the present invention, and may be modified and retouched without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention is subject to the application of the application. [Brief Description of the Drawings] Fig. 1 is a view showing a part of the inner surface side of an inner surface repair joint according to an embodiment of the present invention. Fig. 2 is a partially enlarged cross-sectional view showing the inner face repair joint shown in Fig. 1; Fig. 3 is a view corresponding to Fig. 2 before the extension tape is mounted. Fig. 4 is a view showing a connecting portion of an inner surface repair joint of an embodiment of the present invention, and Fig. 5 is a view showing a state in which a front inner joint joint is attached. Fig. 6 is a view showing a joint portion of an expansion belt of a conventional inner face repair joint. Fig. 7 is a view showing an operation cylinder for expanding an extension belt of a conventional inner face repair joint. [Description of main component symbols] 1, 11a, lib: pipe body h: end of pipe body 1, 2: rubber ring 3, 14a, 14b: expansion band 3a, 31: arc-shaped section 4 · arc shape End portion 5 of segment 3a: locking claw portion 6, 35: spacer 12 201202588 羹|>r "7: operating cylinder 7a: cylinder 7b · piston 8: locking opening 10: pipe inner surface repair joint 12t: inclined surface portions 13a, 13b: auxiliary rubber ring 14c: auxiliary expansion belt (auxiliary expansion ring) 22a, 22b: narrow portions 23a, 23b, 28a, 28b: concave portions 24a, 24b, 26a, 26b: auxiliary narrow portion 28c: auxiliary Concave portion 30: platen 30h: U-shaped hole 40: mounting screw 50: SUS plate 13